Gavin's Game "Boo"

Behind a blanket, a hat, a wall, or his hands - Gavin likes to hide and say "Boo" when appearing. It's SO funny. If I don't notice he's hidden I'll hear "Mom, Mom" until I look and have to ask "Where's Gavin?" If I see his eyes are covered and ask "Are you hiding?" I'll either here "uh-huh" or see his head nod. It's hard to play while driving but we manage.